1. The second stage of meiosis I in which homologous chromosome pairs (bivalents) align at the cell's equatorial plate or metaphase plate before separation
During metaphase I, the paired chromosomes line up at the center of the cell, held in place by spindle fibers.
Durante a metáfase I, os cromossomos pareados se alinham no centro da célula, mantidos no lugar pelas fibras do fuso.
2. The stage in meiosis characterized by the arrangement of bivalents along the metaphase plate prior to anaphase I
The cell remains in metaphase I until the signal for separation is given.
A célula permanece na metáfase I até que o sinal para separação seja dado.
This is a technical scientific term used uniformly in both Brazilian and American educational and research contexts. It is part of standard biology curriculum taught in high schools and universities across both countries. The terminology is consistent in Portuguese-speaking countries, making it essential for students of biology and related sciences.